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Home >> Honda >> 1987 >> Prelude Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Trouble Shooting >> Vacuum Switch C >> Prelude
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Vacuum Switch C: Prelude

  1. Disconnect vacuum hose No. 15 to control box at vacuum manifold. Connect vacuum pump to hose. Apply vacuum to switch. Check for continuity between Black/Yellow and Blue/Black wire terminals of control box 6-pin connector.
  2. Continuity should be present when vacuum above 12 in. Hg is applied. If continuity is not present, replace vacuum switch C and retest.
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